CN119960230A

CN119960230A - Display module, display system and transportation tool

Info

Publication number: CN119960230A
Application number: CN202311442955.8A
Authority: CN
Inventors: 陈世杰; 胡宏波
Original assignee: Shenzhen Yinwang Intelligent Technology Co ltd
Current assignee: Shenzhen Yinwang Intelligent Technology Co ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2025-05-09
Also published as: WO2025092557A1

Abstract

The present application provides a display module that can be used in a projection display device, such as a head-up display system. The display module provided by the present application can eliminate the dark-state light leakage existing in the display device, and improve the imaging performance of the display system while improving the contrast of the display system. The display module includes: a display device and a phase compensation element. Among them, the normal line of the light emitting plane of the display device and the normal line of the light emitting plane of the phase compensation element have a first angle greater than 0, the first coordinate axis of the light emitting plane of the display device and the first coordinate axis of the light emitting plane of the phase compensation element have a second angle greater than 0, and the second coordinate axis of the light emitting plane of the display device and the second coordinate axis of the light emitting plane of the phase compensation element have a third angle greater than 0. The display device is used to emit multiple first light beams from multiple different angles, so that the phase compensation element can compensate for the phase difference of each first light beam in the multiple first light beams.

Description

Display module, display system and vehicle

Technical Field

The present application relates to the field of light display, and more particularly, to a display module, a display system, and a vehicle.

Background

With the continuous advancement and development of technology, display devices have undergone a series of innovations and developments as an important tool for information transfer and display, from the earliest mechanical and electronic display modes to modern high-resolution, high-brightness flat panel display technologies. These breakthrough changes not only change our lifestyle, but also profoundly affect our work and entertainment patterns. The contrast is an important index for evaluating the picture quality of the display device, and the higher the contrast is, the larger the brightness difference of the black-and-white picture is, and the better the visual effect of human eyes is. However, the display device generally has a dark state light leakage phenomenon, and this characteristic greatly limits the improvement of the contrast ratio of the display system. Therefore, how to weaken the residual dark state light leakage of the display device to achieve the purpose of improving the contrast ratio is an urgent problem to be solved.

Disclosure of Invention

The application provides a display module, a display system and a vehicle. The display module provided by the application can eliminate dark state light leakage existing in the display device, so that the contrast ratio of the display system is improved, and the imaging performance of the display system is further improved.

In a first aspect, an embodiment of the present application provides a display module. The display module comprises a display device and a phase compensation element. The normal of the light emitting plane of the display device and the normal of the light emitting plane of the phase compensation element have a first included angle larger than 0, a second included angle larger than 0 is formed between the first coordinate axis of the light emitting plane of the display device and the first coordinate axis of the light emitting plane of the phase compensation element, and a third included angle larger than 0 is formed between the second coordinate axis of the light emitting plane of the display device and the second coordinate axis of the light emitting plane of the phase compensation element. The display device is used for emitting a plurality of first light beams from a plurality of different angles, and the phase compensation element is used for compensating the phase difference of each first light beam in the plurality of first light beams.

By adopting the display device and the phase compensation element which are arranged in a three-dimensional inclined state, the phase differences of the light beams emitted from a plurality of angles can be compensated to different degrees, the phenomenon of weakening residual dark state light leakage of the display device is realized, and the purpose of improving the contrast ratio of the display device is achieved.

With reference to the first aspect, in certain implementation manners of the first aspect, the display module further includes an anti-reflection element, where the anti-reflection element is located between the display device and the phase compensation element, and the anti-reflection element is configured to reduce reflected light of a light emitting plane of the display device.

Based on the scheme, the anti-reflection element can further weaken the reflected light on the surface of the display device under the condition that the phase compensation element is exactly coupled with the display device in an angle, so that the dark field brightness of the display device is further reduced, and the contrast ratio is improved.

With reference to the first aspect, in certain implementations of the first aspect, the anti-reflection element is disposed at a surface of the phase compensation element.

With reference to the first aspect, in certain implementations of the first aspect, the anti-reflective element is disposed at a surface of a light exit plane of the display device.

Based on the scheme, the anti-reflection elements are arranged at different positions, so that the flexibility of the design of the display module can be improved.

In a second aspect, an embodiment of the present application provides a display system. The display system comprises a light source and a display module as described in the first aspect and any one of the possible implementation manners of the first aspect. The light source is used for generating incident light and emitting the incident light to the display module; the display module generates a first image based on the incident light.

With reference to the second aspect, in some implementations of the second aspect, the display system further includes a microlens array and a first polarizing element, where the microlens array is located between the light source and the first polarizing element, and the first polarizing element is located between the microlens array and the display module, and is configured to homogenize the incident light and emit a second light beam after the homogenization to the first polarizing element, and the first polarizing element is configured to convert the second light beam into a first polarized light and emit the first polarized light to the display module, and the display module generates the first image based on the first polarized light.

With reference to the second aspect, in some implementations of the second aspect, the display system further includes a collimating element, where the collimating element is located between the light source and the microlens array, and is configured to collimate the incident light and emit a collimated third light beam toward the microlens array, and the microlens array is specifically configured to homogenize the third light beam and generate the second light beam.

With reference to the second aspect, in certain implementations of the second aspect, the display system further includes a projection module. The display module is used for emitting first image light corresponding to the first image to the projection module, and the projection module is used for generating a second image according to the first image light.

With reference to the second aspect, in some implementations of the second aspect, the display system further includes a second polarizing element, where the second polarizing element is located between the display module and the projection module, and the second polarizing element is configured to convert the first image light into second polarized light and emit the second polarized light to the projection module, where a polarization direction of the first polarized light is perpendicular to a polarization direction of the second polarized light, and the projection module is configured to generate the second image according to the second polarized light.

With reference to the second aspect, in certain implementations of the second aspect, the display system further includes a polarizing beam splitter, where the polarizing beam splitter is located between the first polarizing element and the display module, and the polarizing beam splitting element is configured to reflect the first polarized light to the display device and transmit the second polarized light to the projection module.

In a third aspect, embodiments of the present application provide a vehicle. The vehicle comprises the display system and the windscreen of the second aspect and any possible implementation of the second aspect. The projection module is used for emitting second image light corresponding to the second image to the windshield glass, and the windshield glass is used for reflecting the second image light to human eyes.

In a fourth aspect, an embodiment of the present application provides an in-vehicle system. The in-vehicle system comprises the display system of the second aspect and any one of the possible implementation manners of the second aspect.

Drawings

Fig. 1 is a schematic diagram of the principle of LCoS to generate dark state light leakage.

Fig. 2 is a schematic structural diagram of a first display module 200 according to an embodiment of the application.

Fig. 3 is a schematic diagram showing a three-dimensional placement state of the first display module 200 according to the embodiment of the application by using an in-plane angle and an out-of-plane angle.

Fig. 4 is a schematic structural diagram of a second display module 400 according to an embodiment of the application.

Fig. 5 is a schematic diagram showing a three-dimensional placement state of a second display module 400 using an in-plane corner and an out-of-plane corner according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a light leakage simulation effect according to an embodiment of the present application.

Fig. 7 is a schematic diagram of contrast effect provided by an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a third display module 800 according to an embodiment of the application.

Fig. 9 is a schematic diagram of a first display system 900 according to an embodiment of the application.

Fig. 10 is a schematic diagram of a second display system 1000 according to an embodiment of the application.

Fig. 11 is a schematic diagram of a third display system 1100 according to an embodiment of the application.

Fig. 12 is a schematic diagram of a fourth display system 1200 according to an embodiment of the application.

Fig. 13 is a schematic block diagram of a fifth display system 1300 according to an embodiment of the present application.

Fig. 14 is a schematic block diagram of a sixth display system 1400 according to an embodiment of the present application.

Fig. 15 is a schematic diagram of a HUD system 1500 according to an embodiment of the present application.

Fig. 16 is a schematic diagram of an optical path 1600 of a HUD system 1600 according to an embodiment of the present application applied to a vehicle.

Fig. 17 is a schematic circuit diagram of a display device according to an embodiment of the application.

Fig. 18 is a schematic diagram of a possible functional framework of a vehicle according to an embodiment of the present application.

Detailed Description

The technical scheme of the application will be described below with reference to the accompanying drawings.

The technical scheme provided by the application can be applied to the technical field of display, such as a direct-view display system and a projection display system, wherein the direct-view display system is characterized in that a displayed image is presented on a display device, a user watches the image displayed on the display device, the geometric dimension of the display device is basically consistent with the dimension of the displayed image, and the dimension of a color image displayed by a liquid crystal display (liquid CRYSTAL DISPLAY, LCD) of 32 inches is also 32 inches. The projection type display system is characterized in that an image presented on the display device is further enlarged by an optical system (generally referred to as a light engine or an optical machine) to finally display the enlarged image on a projection screen, and thus, the size of the projection display device itself is not consistent with the size of the image that can be displayed, for example, a 0.7 inch or 1.3 inch projection type display device can display a 50 inch image. In general, projection display systems are composed of circuitry, optics, imaging devices, projection lenses, and projection screens. Common projection display systems, such as Head Up Display (HUD) systems, home theater projection systems, augmented reality (augmented reality, AR) head mounted displays, virtual Reality (VR) head mounted displays, and the like. In addition, the technical scheme of the application can also be applied to a microscopic imaging system and the like.

The following description is made in order to facilitate understanding of embodiments of the present application.

The first, the text descriptions of embodiments of the application or the terms in the drawings shown below, "first," "second," etc. and various numbers are merely for descriptive convenience and are not intended to limit the scope of embodiments of the application. For example, a first beam, a second beam, etc. are used to distinguish between the different beams.

Second, in the description of the embodiments of the present application, "plurality" means two or more, and "at least one" and "one or more" mean one, two or more. The singular expressions "a," "an," "the," and "such" are intended to include, for example, also "one or more" such expressions, unless the context clearly indicates to the contrary.

Third, references to "some embodiments" or the like described in this specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

Fourth, in the description of the embodiments of the present application, the terms "front," "upper," "right," and the like, indicating an azimuth or positional relationship are defined with respect to the azimuth or position in which the components in the drawings are schematically placed, and it should be understood that these directional terms are relative terms are used for descriptive and clarity with respect to each other, rather than to indicate or imply that the apparatus or component in question must have a specific azimuth or be constructed and operated in a specific azimuth configuration, which may vary accordingly depending on the azimuth in which the components in the drawings are placed, and thus should not be construed as limiting the present application.

Fifth, the terms "comprises," "comprising," and "having," and any variations thereof, in the embodiments of the present application, as illustrated below, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

Sixth, in embodiments of the application, the words "exemplary" or "such as" are used to mean examples, illustrations, or descriptions, and embodiments or designs described as "exemplary" or "such as" should not be construed as being preferred or advantageous over other embodiments or designs. The use of the word "exemplary" or "such as" is intended to present the relevant concepts in a concrete fashion to facilitate understanding.

Seventh, in the embodiments of the present application, the same reference numerals are used to denote the same components or the same parts. In addition, the various components in the drawings are not to scale, and the dimensions and sizes of the components shown in the drawings are merely illustrative and should not be construed as limiting the application.

Eighth, unless otherwise defined, all terms (including technical and scientific terms) used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Ninth, the present application relates to an antireflection film (anti-reflection coating, AR), also called an antireflection film or an antireflection film. The film is typically composed of alternating high and low index materials. Wherein, the high refractive index film layer can cause the phase retardation of the light wave, and the low refractive index film layer can cause the phase advance of the light wave. When light enters the substrate surface from the external medium, a part of light waves are reflected on the substrate surface, and the other part of light waves are transmitted through the substrate and are reflected again to be emitted, so that interference occurs with the reflected light on the surface. Therefore, the thickness and the refractive index of each layer are controlled, so that the interference effect at the surface of the substrate is minimized, and the purposes of antireflection and reflection prevention are achieved. An anti-reflection element for reducing reflected light may be formed by plating AR on the substrate.

Liquid crystal on silicon (liquid crystal on silicon, LCoS) is an optical device that uses liquid crystal material to control the direction and phase of light propagation. In LCoS devices, the orientation of the liquid crystal molecules may be adjusted by an electric field, which will change the phase and polarization state of the incident light. However, LCoS can generate dark state light leakage phenomenon during operation because of the birefringence property of the liquid crystal material. As shown in fig. 1, the dark state light leakage is mainly because the LCoS device cannot be an ideal device, and the light beam emitted by the light source is incident on the LCoS device with a certain oblique incidence angle. If the propagation internal angle of the light beam in the spatial propagation process is defined as (δ, σ), and the two mutually perpendicular unit vectors of the LCoS device are c ₁,c₂, the spatial wave vector of the incident light beam can be written as:

At this time, the transmittance T that the incident light in the range of c ₁＝x,c₂ =y has after passing through the liquid crystal molecules may be expressed as follows, i.e., dark state light leakage may be expressed as:

In order to reduce the dark state light leakage phenomenon in the LCoS device, some techniques may be adopted, such as increasing the thickness of the liquid crystal layer, changing the alignment manner of the liquid crystal material, using a material that suppresses birefringence, and the like. In addition, dark state light leakage can be reduced by optimizing the design and manufacturing process of the LCoS.

However, these means have limited ability to attenuate dark light leakage, and the improvement of contrast is not satisfactory, and at the same time, the problems of high cost, complex process, no mass production, small application range, and the like are faced.

In view of this, an embodiment of the present application provides a display module, in which, by placing a suitable phase compensation element in front of a display device, and adjusting at least one element of the display device and the phase compensation element on a three-dimensional coordinate, the relative positions of the display device and the phase compensation element present a three-dimensional morphological structure, so as to achieve the purposes of compensating for phase deviation of a light beam and weakening dark state light leakage, and further achieve the effect of improving display contrast.

Fig. 2 is a schematic structural diagram of a first display module 200 according to an embodiment of the application. The display module 200 includes a display device 210 and a phase compensation element 220. The display device 210 is configured to emit a plurality of light beams from a plurality of different angles. The phase compensation element 220 is used to compensate for a phase difference of each of the plurality of light beams emitted from the display device 210.

Specifically, as shown in fig. 2, the light emitting plane of the display device 210 is parallel to the horizontal plane, and the light emitting plane of the phase compensation element 220 is disposed obliquely in three dimensions with respect to the horizontal plane. The light emitting plane of the display device 210 is an xoy plane, the normal line of the light emitting plane of the display device 210 is along the z-axis direction, the light emitting plane of the phase compensation element 220 is an x ' oy ' plane, and the normal line of the light emitting plane of the phase compensation element 220 is along the z ' axis direction. Wherein, the included angle alpha between the x axis and the x ' axis is not equal to 0, the included angle beta between the y axis and the y ' axis is not equal to 0, and the included angle gamma between the z axis and the z ' axis is not equal to 0.

Alternatively, the display device 210 is an LCoS display chip, or an LCD display chip, which is not limited by the present application.

It should be noted that, in the embodiment of the present application, the light emitting plane of the display device 210 and the light emitting plane of the phase compensation element are defined by the angle of the dark state light leakage emitted from the display device 210. As can be seen from the above description of fig. 1, when the incident light with oblique incidence passes through the display device 210, some light beams cannot be fully modulated due to the birefringence of the liquid crystal molecules, i.e. there is a phase difference between two components of the light beams perpendicular to each other, which results in dark state light leakage and emergence of the display device 210. These outgoing light beams exit the display device 210 and are incident on the surface of the phase compensation element 220 (i.e., surface 1 in fig. 2), and then the transmission phase compensation element 220 exits from the other surface (i.e., surface 2 in fig. 2). Therefore, according to the transmission direction of the light beam generated by the light leakage, the light emitting plane of the display device 210 and the light emitting plane of the phase compensation element 220 are respectively shown in fig. 2.

It should be understood that, in the description of the embodiments of the present application, the light emitting plane of the display device 210 and the light emitting plane of the phase compensation element 220 are defined for the purpose of illustration, the display device 210 and the phase compensation element 220 are disposed in a three-dimensional tilt state, and the three-dimensional tilt state is defined by an included angle between the light emitting plane of the display device 210 and a coordinate axis of the light emitting plane of the phase compensation element 220 and an included angle between normals of the two light emitting planes, that is, different included angles may correspond to different three-dimensional tilt states.

It will be further appreciated that the three-dimensional tilt state provided between the display device 210 and the phase compensation element 220 can also be described in terms of the angle of the incident light, where the plane of the incident light of the display device 210 is still the xoy plane shown in fig. 2, the normal direction is perpendicular to the xoy plane, and the plane of the incident light of the phase compensation element 220 is the surface 1, the plane coordinate system of the surface 1 is still the x 'oy' plane, but the normal direction is opposite to the normal direction of the surface 2.

Note that, in the case of an LCoS display chip (may also be referred to as a display device) or an LCD display chip, when there is a dark state light leakage, since the phase compensation element 220 is not parallel to the display device 210 in all three coordinate axis directions, the phases of the light beams generated by the dark state light leakage emitted from the display device 210 at different angles are different from each other, so that the phase compensation of the light beams generated by the light leakage at different angles can be realized. For example, when the display device 210 is an LCoS display chip, a plurality of light beams emitted from a plurality of different angles by the LCoS display chip, due to different phase modulation effects of the liquid crystal molecules, the phase differences of the o light and the e light in the plurality of light beams are different, and after the plurality of light beams pass through the phase compensation element 220, since the three-dimensional coordinates at different positions of the phase compensation element 220 are different, the phase compensation effect of the plurality of light beams passing through the phase compensation element 220 after entering the different positions of the phase compensation element 220 is also different, so as to realize different phase compensation effects on the light beams with different angles.

It will be appreciated that fig. 2 is illustrated with the light exit plane of the display device 210 being parallel to the horizontal plane, and that the phase compensation element 220 is arranged above the display device 210. In other embodiments, the phase compensation element 220 may be disposed in other directions of the display device 210, such as the right side of the display device 210, where the light exit plane of the display device 210 is parallel to the plane xoz, and the light leakage beam exiting the display device 210 is transmitted to the right side to the phase compensation element 220. Similarly, for other arrangement scenarios, no further description is provided herein.

It is further understood that, since the included angle between the display device 210 and the phase compensation element 220 (the included angle α, the included angle β, and the included angle γ in the above description) is not 0, it is understood that the phase compensation element 220 rotates on three coordinate axes relative to the display device 210, so that the phase compensation element 220 and the display device 210 are placed in a three-dimensional space. In fig. 2, the state in which the display device 210 and the phase compensation element 220 are placed in a three-dimensional space is described by a three-dimensional coordinate system, but the present application is not limited thereto. In other descriptions, the internal angle of the face can also be usedAnd the out-of-plane angle θ illustrate the three-dimensional spatial placement of the display device 210 and the phase compensation element 220. Wherein the interior angle of the faceThe rotation angle of any one coordinate axis of the light emitting plane of the phase compensation element 220 with respect to the corresponding coordinate axis of the light emitting plane of the display device 210. For example, in FIG. 3, the interior angle of the faceFor rotation of phase compensation element 220 along the y' axisAnd then coincides with the y-axis of the display device 210. The out-of-plane angle θ is the rotation angle of the light exit plane of the phase compensation element 220 with respect to a certain projection plane. For example, in fig. 3, the out-of-plane angle θ is the plane of xoz of the display device 210 after rotation of the phase compensation element 220 along the x 'oz' plane by θ.

Based on the above scheme, the display module provided by the application can realize the compensation of dark state light leakage of the display device by adjusting different three-dimensional states of the phase compensation element, and it can be understood that the dark field brightness of the display device can be weakened to the greatest extent under the condition that the phase compensation element is exactly in angle coupling with the display device.

Fig. 4 is a schematic structural diagram of a second display module 400 according to an embodiment of the application. The display module 400 includes a display device 210 and a phase compensation element 220. In fig. 4, compared to the display module 200 shown in fig. 2, the light emitting plane of the phase compensation element 220 is parallel to the horizontal plane, and the light emitting plane of the display device 210 is disposed obliquely with respect to the horizontal plane. At this time, the display device 210 rotates on three coordinate axes in the z-axis direction with the light emitting plane of the phase compensation element 220, that is, the xoy plane, as a reference, and the normal line of the light emitting plane of the phase compensation element 220. I.e. the light exit plane of the display device 210 is the x ' oy ' plane, the x axis has an angle α with the x ' axis that is not equal to 0, the y axis has an angle β with the y ' axis that is not equal to 0, and the z axis has an angle γ with the z ' axis that is not equal to 0.

Likewise, other arrangements of the phase compensation element 220 and the display device 210 are possible, for example, when the phase compensation element 220 is located on the left side of the display device 210, the light emitting plane of the phase compensation element 220 is parallel to the plane xoz, and the light leakage beam emitted from the display device 210 is transmitted to the left side of the phase compensation element 220.

In addition, can also pass through the internal angle of the surfaceAnd the out-of-plane angle θ illustrate the three-dimensional spatial placement of the display device 210 and the phase compensation element 220 of fig. 4, as shown in fig. 5. In fig. 5, the display device 210 rotates the in-plane interior angle along the y' axisAnd then coincides with the y-axis of the three-dimensionally placed phase compensation element 220. The display device 210, after being rotated by θ along the x 'oz' plane, coincides with the xoz plane of the three-dimensionally placed phase compensation element 220. Wherein the interior angle of the faceThe definition of the out-of-plane angle θ can be referred to in the relevant description of fig. 2, and will not be repeated here.

In the display modules shown in fig. 2 to 4, the light emitting plane and the horizontal plane of one device are taken as an example, and for example, in fig. 2 and 3, the light emitting plane of the display device 210 is the horizontal plane. In fig. 4 and 5, the light exit plane of the phase compensation element 220 is a horizontal plane. It will be appreciated that for a more general use scenario, the three-dimensional space placement states of the display device 210 and the phase compensation element 220 may also be such that the light exit plane of the display device 210 and the light exit plane of the phase compensation element 220 are not parallel to the horizontal plane, and the rotation angles of the light exit plane of the display device 210 and the light exit plane of the phase compensation element 220 relative to each coordinate axis (x-axis, y-axis, and z-axis in a cartesian coordinate system) are different. For example, when the light emitting plane of the display device 210 and the light emitting plane of the phase compensation element 220 are not parallel to the horizontal plane, if the angles of rotation of the light emitting plane of the display device 210 relative to the x, y, and z coordinate axes are α1, β1, and γ1, respectively, and the angles of rotation of the light emitting plane of the phase compensation element 220 relative to the x, y, and z coordinate axes are α2, β2, and γ2, respectively, α1 and α2 are not equal, β1 and β2 are not equal, and γ1 and γ2 are not equal.

Fig. 6 is a schematic diagram of a light leakage simulation effect according to an embodiment of the present application. In fig. 6, a phase compensation plate having a horizontal retardation Re of 21nm and a vertical retardation Rth of 200nm was used in combination with a twisted nematic (TWISTED NEMATIC, TN) LCOS. When the LCoS display module does not include the phase compensation plate, there is a significant dark state light leakage in the angular distribution of the light irradiated onto the LCoS, as shown in fig. 6 (a), and when the phase compensation plate and the LCoS are in a three-dimensional placement state (LCoS is placed horizontally, the compensation plate is placed obliquely, or the compensation plate is placed horizontally, the LCoS is placed obliquely), the overall dark state light leakage is further reduced compared with fig. 6 (a), as shown in fig. 6 (b).

Fig. 7 is a schematic diagram of contrast effects provided by the embodiment of the present application, corresponding to (a) and (b) in fig. 6. When the LCoS display module does not contain the phase compensation sheet, the whole picture dark field can be seen to lighten as shown in (a) of fig. 7, and when the phase compensation sheet and the LCoS are in a three-dimensional placement state (the LCoS is horizontally placed, the compensation sheet is obliquely placed, or the compensation sheet is horizontally placed, the LCoS is obliquely placed), the contrast ratio is remarkably improved, and the picture dark field is obviously darkened as shown in (b) of fig. 7. Therefore, it can be seen that the display module provided by the application can reduce dark state light leakage of the display device, thereby achieving the effect of improving the display contrast.

It should be noted that, the data in fig. 6 and the simulation effects in fig. 6 and fig. 7 are only for illustrating that the scheme of the present application can significantly reduce the light leakage phenomenon of the display device and improve the display contrast, and are not intended to limit the protection scope of the present application.

Since the interference effect may also occur due to multiple reflections and refractions of the light beams emitted from the light emitting plane of the display device 210, in order to further reduce the reflected light of the light emitting plane of the display device 210, fig. 8 is a schematic structural diagram of a third display module 800 according to an embodiment of the present application. In fig. 8, the display module further includes an anti-reflection element 830, where the anti-reflection element 830 is located between the display device 210 and the phase compensation element 220, for reducing the reflected light of the light emitting plane of the display device 210. The roles and the related descriptions of the display device 210 and the phase compensation element 220 may refer to fig. 2 or fig. 4, and are not described herein.

Optionally, the anti-reflective element 810 is an anti-reflective film (anti-reflection coating, AR) element.

It should be noted that the position and number of the anti-reflection elements 810 are not limited in the present application, for example, in fig. 8, the anti-reflection elements 810 are disposed on the light emitting surface of the display device 210. In other embodiments, anti-reflection element 810 may also be disposed on surface 1 of phase compensation element 220. In other embodiments, anti-reflective element 810 may also be disposed on both surface 1 of phase compensation element 220 and the light exit surface of display device 210.

In fig. 8, the display device 210 and the phase compensation element 220 are parallel to each other, but the present application is not limited thereto. When one or two anti-reflection elements are disposed in the display module, the three-dimensional space between the display device 210 and the phase compensation element 220 may be disposed horizontally by using the display device 210 as shown in fig. 2, the phase compensation element 220 may be disposed obliquely in three dimensions, or the display device 210 may be disposed obliquely in three dimensions by using the phase compensation element 220 as shown in fig. 4, or the display device 210 and the phase compensation element 220 may be disposed obliquely in different three dimensions.

In the above, the display module provided by the embodiment of the present application is described with reference to fig. 2 to 8, and next, some possible structures of the display system provided by the present application are described with reference to the display module shown in fig. 2 to 8.

Fig. 9 is a schematic diagram of a first display system 900 according to an embodiment of the application. As shown in fig. 9, the display system 900 includes a light source 910 and a display module 920. The light source 910 is configured to generate incident light and emit the incident light to the display module 920. The display module 920 generates a first image based on the incident light, and emits first image light. It is understood that the display module 920 may be the display module 200 shown in fig. 2, or the display module 400 shown in fig. 4, or the display module 600 shown in fig. 6, or other display modules within the scope of the present application. In addition, for other descriptions of the display module 920, reference may be made to the above related parts, which are not described herein.

The light source 910 may be an array light source composed of light-emitting diodes (LEDs), a laser light source, a cathode fluorescent tube, or the like, according to the display device included in the display module 920. For example, when the display device included in the display module 920 is LCoS, the light source 910 may be a red, green, and blue led light source, or the light source 910 may be a red, green, and blue laser light source, which together with LCoS form an LCoS display system. Or when the display device included in the display module 920 is an LCD, the light source 910 may be a linear light source of a red, green, and blue cold cathode fluorescent tube, and form an LCD display system with the LCD.

In order to further enhance the display effect, fig. 10 is a schematic diagram of a second display system 1000 according to an embodiment of the application. As shown in fig. 10, the display system 1000 includes a light source 910, a microlens array 1010, a first polarizing element 1020, and a display module 920. The light source 910 is configured to generate incident light and emit the incident light to the microlens array 1010. The microlens array 1010 is used to homogenize incident light and output the homogenized first light beam to the first polarizing element 1020. The first polarizing element 1020 is configured to convert the first light beam into first polarized light, and emit the first polarized light to the display module 920. The display module 920 generates a first image based on the first polarized light and emits a first image light.

In contrast to the display system 900 shown in fig. 9, the microlens array 1010 in the display system 1000 is capable of shaping an incident light beam such that the spot of the first light beam is uniform. Alternatively, microlens array 1020 is a fly-eye lens. When the microlens array 1020 is a fly-eye lens, it may be a double-row fly-eye lens or a single-row fly-eye lens, which is not limited by the present application.

In an embodiment of the present application, the first polarizing element 1020 may be selected according to the type of display device in the display module 920. Illustratively, if the display device included in the display module 920 is an LCoS display device and the LCoS display device is of a P-type phase modulation type, the first polarizing element 1020 is a P-ray polarizer. If the display device included in the display module 920 is an LCoS display device and the LCoS display device is of an S-type phase modulation type, the first polarizing element 1020 is an S-ray polarizer.

It is to be understood that, for other descriptions of the light source 910 and the display module 920, reference may be made to relevant portions in fig. 9, and detailed descriptions thereof are omitted herein.

To further enhance the light uniformity performance of the microlens array 1010, in some embodiments, collimating elements, such as collimating lenses, may be disposed in front of the microlens array 1010, thereby providing better light uniformity performance of the microlens array 1010. As shown in fig. 11, the collimating element 1110 is configured to collimate incident light from the light source 910 and emit a collimated second light beam to the microlens array 1010, so that the microlens array 1010 homogenizes the second light beam to generate a first light beam.

It will be appreciated that the description of other elements in the display system 1100 may refer to the relevant portions above, and will not be repeated here.

It should be noted that, when the display module provided in the embodiment of the present application is used in a projection display system, fig. 12 is a schematic block diagram of a fourth display system 1200 provided in the embodiment of the present application. In fig. 12, the display module 920 emits first image light to the projection module 1210, and the projection module 1210 is configured to generate a second image according to the first image light.

Optionally, the projection module 1210 is a projection lens formed by one or more lenses, so as to amplify the first image and generate an amplified second image.

It will be appreciated that the description of other elements in the display system 1200 may be referred to above in relevant portions, and will not be repeated here.

Fig. 13 is a schematic block diagram of a fifth display system 1300 according to an embodiment of the present application. In fig. 13, compared to fig. 12, since the first image light emitted from the display device 920 is polarized light, and the polarization direction of the first image light is perpendicular to the polarization direction of the first polarized light, the effect of reflecting the first polarized light and transmitting the first image light can be achieved by providing the polarization beam splitter 1310, for example, a polarization beam splitter, between the first polarization element 1020 and the display module 920, and thus the effect of folding the optical path can be achieved.

It will be appreciated that the description of other elements in the display system 1300 may be referred to above in relevant portions, and will not be repeated here.

Alternatively, in order to further remove the parasitic light in the first image light, a second polarizing element may be disposed before the first image light enters the polarizing beam splitting element 1310, as shown in fig. 14. The polarization direction of the second polarization element 1410 is perpendicular to the polarization direction of the first polarization element 1020 for converting the first image light into completely polarized light.

It will be appreciated that the description of other elements in the display system 1400 may be referred to above in relevant portions, and will not be repeated here.

It should be noted that fig. 9 to 14 are only examples of the display system provided by the present application, and it should be understood that any display system including the display module provided by the embodiment of the present application is within the scope of the present application.

Fig. 15 is a schematic diagram of a HUD system 1500 according to an embodiment of the present application. As shown in fig. 15, the HUD system 1500 includes an image generation unit (picture generation unit, PGU) 1501, a diffusion screen 1502, a first reflective element 1503, and a second reflective element 1504. Wherein PGU 1501 is used to project image light toward diffuser screen 1502. The diffusion screen 1502 is configured to transmit image light from the PGU 1501 to the first reflecting element 1503, and generate a relayed image based on the image light from the PGU 1501. The first reflecting element 1503 is used to reflect the image light emitted from the diffusion screen 1502 to the second reflecting element 1504. The second reflecting element 1504 is for reflecting the image light reflected by the first reflecting element 1503 toward the human eye. The PGU 1501 may be any one of the display systems shown in fig. 9 to 14, or a new display system extended from any one of the display systems shown in fig. 9 to 14.

Optionally, the HUD system 1500 may also include a dust cap 1505. The dust cap 1505 is provided with the function of isolating the external high temperature, avoiding the internal temperature of the HUD system 1500 from being too high, or avoiding external dust from entering the device, etc.

In the display device 1500 shown in fig. 15, the first reflective element 1503 may be a concave mirror, a convex mirror, or a plane mirror, the surface of which forms a free-form surface, which is not limited by the present application.

It is to be understood that the number of reflective elements included in the display device 1500 is not limited to that shown in fig. 15, and can be adjusted accordingly as required.

Fig. 16 is a schematic diagram of an optical path 1600 of a HUD system 1600 according to an embodiment of the present application when the HUD system 1500 is applied to a vehicle. Specifically, the PGU 1501 generates image light and projects the image light toward the diffusion screen 1502, the diffusion screen 1502 transmits the image light from the PGU 1501 onto the first reflective element 1503, then the first reflective element 1503 reflects the diffused image light to the second reflective element 1504, and the image light is reflected by the 1504 and then transmitted through the mask 1505 and reflected to the human eye via the windshield 1601 to image. The image generated by the image light can be an augmented reality display image, and is used for displaying information such as indication information and navigation information of an external object. Or the image generated by the image light may be a status display image for displaying status information of the vehicle. Taking an automobile as an example, the state information of the vehicle includes, but is not limited to, information such as a driving speed, a driving mileage, a fuel amount, a water temperature, and a lamp state.

It is to be understood that the present application may be applied to vehicles including, but not limited to, automobiles, airplanes, trains, or ships.

In addition, the embodiment of the application also provides a vehicle, and the vehicle is provided with any one of the display devices. Vehicles include, but are not limited to, automobiles, airplanes, trains, or ships, etc.

Fig. 17 is a schematic circuit diagram of a display device according to an embodiment of the application. As shown in fig. 17, the circuits in the display device mainly include a main processor (host CPU) 1201, an external memory interface 1202, an internal memory 1203, an audio module 1204, a video module 1205, a power supply module 1206, a wireless communication module 1207, an i/O interface 1208, a video interface 1209, a display circuit 1210, a modulator 1212, and the like. The main processor 1201 and its peripheral components, such as an external memory interface 1202, an internal memory 1203, an audio module 1204, a video module 1205, a power module 1206, a wireless communication module 1207, an i/O interface 1208, a video interface 1209, and a display circuit 1210, may be connected via a bus. The main processor 1201 may be referred to as a front-end processor.

In addition, the circuit diagram illustrated in the embodiment of the present application does not constitute a specific limitation of the display device. In other embodiments of the application, the display device may include more or less components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The main Processor 1201 includes one or more processing units, for example, the main Processor 1201 may include an application Processor (Application Processor, AP), a modem Processor, a graphics Processor (Graphics Processing Unit, GPU), an image signal Processor (IMAGE SIGNAL Processor, ISP), a controller, a video codec, a digital signal Processor (DIGITAL SIGNAL Processor, DSP), a baseband Processor, and/or a neural network Processor (Neural-Network Processing Unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

A memory may also be provided in the main processor 1201 for storing instructions and data. In some embodiments, the memory in the main processor 1201 is a cache memory. The memory may hold instructions or data that is just used or recycled by the main processor 1201. If the main processor 1201 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided, reducing the latency of the main processor 1201, and thus improving the efficiency of the system.

In some embodiments, the display device may also include a plurality of Input/Output (I/O) interfaces 1208 connected to the main processor 1201. Interface 1208 can include an integrated circuit (Inter-INTEGRATED CIRCUIT, I2C) interface, an integrated circuit built-in audio (Inter-INTEGRATED CIRCUIT SOUND, I2S) interface, a pulse code modulation (Pulse Code Modulation, PCM) interface, a universal asynchronous receiver Transmitter (Universal Asynchronous Receiver/Transmitter, UART) interface, a mobile industry processor interface (Mobile Industry Processor Interface, MIPI), a General-Purpose Input/Output (GPIO) interface, a subscriber identity module (Subscriber Identity Module, SIM) interface, and/or a universal serial bus (Universal Serial Bus, USB) interface, among others. The I/O interface 1208 may be connected to a mouse, a touch pad, a keyboard, a camera, a speaker/horn, a microphone, or a physical key (e.g., a volume key, a brightness adjustment key, an on/off key, etc.) on the display device.

The external memory interface 1202 may be used to connect an external memory card, such as a Micro SD card, to enable expansion of the memory capabilities of the display device. The external memory card communicates with the main processor 1201 through the external memory interface 1202 to realize a data storage function.

The internal memory 1203 may be used to store computer executable program code that includes instructions. The internal memory 1203 may include a stored program area and a stored data area. The storage program area may store an operating system, an application program (such as a call function, a time setting function, etc.) required for at least one function, and the like. The storage data area may store data created during use of the display device (e.g., phone book, universal time, etc.), etc. In addition, the internal memory 1203 may include a high speed random access memory, and may also include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (Universal Flash Storage, UFS), and the like. The main processor 1201 performs various functional applications of the display apparatus and data processing by executing instructions stored in the internal memory 1203 and/or instructions stored in a memory provided in the main processor 1201.

The display device may implement audio functions through the audio module 1204, an application processor, and the like. Such as music playing, talking, etc.

The audio module 1204 is used to convert digital audio information into an analog audio signal output, and also to convert an analog audio input into a digital audio signal. The audio module 1204 may also be used to encode and decode audio signals, such as for playback or recording. In some embodiments, the audio module 1204 may be provided in the main processor 1201, or some of the functional modules of the audio module 1204 may be provided in the main processor 1201.

The Video interface 1209 may receive an externally input audio/Video signal, which may specifically be a high-definition multimedia interface (High Definition Multimedia Interface, HDMI), a digital Video interface (Digital Visual Interface, DVI), a Video graphics array (Video GRAPHICS ARRAY, VGA), a Display Port (DP), etc., and the Video interface 1209 may also output Video. When the display device is used as a head-up display, the video interface 1209 may receive a speed signal and an electric quantity signal input by the peripheral device, and may also receive an AR video signal input from the outside. When the display device is used as a projector, the video interface 1209 may receive a video signal input from an external computer or a terminal device.

The video module 1205 may decode video input by the video interface 1209, for example, h.264 decoding. The video module can also encode the video collected by the display device, for example, H.264 encoding is carried out on the video collected by the external camera. In addition, the main processor 1201 may decode the video input from the video interface 1209 and output the decoded image signal to the display circuit 1210.

The display circuit 1210 and modulator 1212 are used to display a corresponding image. In this embodiment, the video interface 1209 receives an externally input video source signal, and the video module 1205 decodes and/or digitizes the video source signal to output one or more image signals to the display circuit 1210, and the display circuit 1210 drives the modulator 1212 to image the incident polarized light according to the input image signal, so as to output image light. In addition, the main processor 1201 may output one or more image signals to the display circuit 1210.

In this embodiment, the display circuit 1210 and the modulator 1212 belong to the electronic components in the PGU 1301, and the display circuit 1210 may be referred to as a driving circuit.

The power module 1206 is configured to provide power to the main processor 1201 and the light source 1200 based on input power (e.g., direct current), and the power module 1206 may include a rechargeable battery therein, which may provide power to the main processor 1201 and the light source 1200. Light from light source 1200 may be transmitted to modulator 1212 for imaging to form an image light signal.

The wireless Communication module 1207 may enable the display device to wirelessly communicate with the outside world, which may provide solutions for wireless Communication such as wireless local area network (Wireless Local Area Networks, WLAN) (e.g., wireless fidelity (WIRELESS FIDELITY, wi-Fi) network), bluetooth (BT), global navigation satellite system (Global Navigation SATELLITE SYSTEM, GNSS), frequency modulation (Frequency Modulation, FM), near field Communication (NEAR FIELD Communication, NFC), infrared (IR), etc. The wireless communication module 1207 may be one or more devices that integrate at least one communication processing module. The wireless communication module 1207 receives electromagnetic waves via an antenna, modulates the electromagnetic wave signals, performs filtering processing, and transmits the processed signals to the main processor 1201. The wireless communication module 1207 may also receive a signal to be transmitted from the main processor 1201, frequency modulate the signal, amplify the signal, and convert the signal into electromagnetic waves to radiate the electromagnetic waves through an antenna.

In addition, the video data decoded by the video module 1205 may be received wirelessly by the wireless communication module 1207 or read from an external memory, for example, the display device may receive video data from a terminal device or an in-vehicle entertainment system through a wireless lan in the vehicle, and the display device may read audio/video data stored in the external memory, in addition to the video data input through the video interface 1209.

The display device may be mounted on a vehicle, please refer to fig. 18, fig. 18 is a schematic diagram of a possible functional frame of a vehicle according to an embodiment of the present application.

As shown in FIG. 18, various subsystems may be included in the functional framework of the vehicle, such as a sensor system 12, a control system 14, one or more peripheral devices 16 (one shown in the illustration), a power supply 18, a computer system 20, and a heads-up display system 22, as shown. Alternatively, the vehicle may include other functional systems, such as an engine system to power the vehicle, etc., as the application is not limited herein.

The sensor system 12 may include a plurality of sensing devices that sense the measured information and convert the sensed information to an electrical signal or other desired form of information output according to a certain rule. As shown, these detection devices may include, but are not limited to, a global positioning system (global positioning system, GPS), a vehicle speed sensor, an inertial measurement unit (inertial measurement unit, IMU), a radar unit, a laser rangefinder, an imaging device, a wheel speed sensor, a steering sensor, a gear sensor, or other elements for automatic detection, and so forth.

The control system 14 may include several elements such as a steering unit, a braking unit, a lighting system, an autopilot system, a map navigation system, a network timing system, and an obstacle avoidance system as shown. Optionally, control system 14 may also include elements such as throttle controls and engine controls for controlling the speed of travel of the vehicle, as the application is not limited.

Peripheral device 16 may include several elements such as the communication system in the illustration, a touch screen, a user interface, a microphone, and a speaker, among others. Wherein the communication system is used for realizing network communication between the vehicle and other devices except the vehicle. In practical applications, the communication system may employ wireless communication technology or wired communication technology to enable network communication between the vehicle and other devices. The wired communication technology may refer to communication between the vehicle and other devices through a network cable or an optical fiber, etc.

The power source 18 represents a system that provides power or energy to the vehicle, which may include, but is not limited to, a rechargeable lithium battery or lead acid battery, or the like. In practical applications, one or more battery packs in the power supply are used to provide electrical energy or power for vehicle start-up, the type and materials of the power supply are not limiting of the application.

Several functions of the vehicle are performed by the control of the computer system 20. The computer system 20 may include one or more processors 2001 (shown as one processor) and memory 2002 (which may also be referred to as storage devices). In practical applications, the memory 2002 is also internal to the computer system 20, or external to the computer system 20, for example, as a cache in a vehicle, and the application is not limited thereto.

Wherein,

Processor 2001 may include one or more general-purpose processors, such as a graphics processor (graphic processing unit, GPU). The processor 2001 may be used to execute related programs or instructions corresponding to the programs stored in the memory 2002 to implement the corresponding functions of the vehicle.

The memory 2002 may comprise volatile memory (RAM), for example, or non-volatile memory (non-vlatile memory), for example, ROM, flash memory (flash memory), HDD, or solid state drive SSD, or a combination of the above types of memory 2002. Memory 2002 may be used to store a set of program codes or instructions corresponding to the program codes so that processor 2001 invokes the program codes or instructions stored in memory 2002 to implement the corresponding functions of the vehicle. In the present application, the memory 2002 may store a set of program codes for vehicle control, and the processor 2001 may call the program codes to control the safe running of the vehicle, and how the safe running of the vehicle is achieved will be described in detail below.

Alternatively, the memory 2002 may store information such as road maps, driving routes, sensor data, and the like, in addition to program codes or instructions. The computer system 20 may implement the relevant functions of the vehicle in combination with other elements in the functional framework schematic of the vehicle, such as sensors in the sensor system, GPS, etc. For example, the computer system 20 may control the direction of travel or speed of travel of the vehicle, etc., based on data input from the sensor system 12, and the application is not limited.

Head-up display system 22 may include several elements, such as a windshield, controller, and head-up display as shown. The controller 222 is configured to generate an image (for example, generate an image including a vehicle state such as a vehicle speed, an electric quantity/oil quantity, etc. and an image of augmented reality AR content) according to a user instruction, and send the image to a head-up display for display, where the head-up display may include an image generating unit and a mirror combination, and the front windshield is configured to cooperate with the head-up display to implement an optical path of the head-up display system, so that a target image is presented in front of a driver. The functions of some elements in the head-up display system may be implemented by other subsystems of the vehicle, for example, the controller may be an element in the control system.

Wherein FIG. 18 illustrates the present application as including four subsystems, sensor system 12, control system 14, computer system 20, and heads-up display system 22, by way of example only, and not by way of limitation. In practical applications, the vehicle may combine several elements in the vehicle according to different functions, thereby obtaining subsystems with corresponding different functions. In practice, the vehicle may include more or fewer systems or elements, and the application is not limited.

The above-mentioned vehicles may be cars, trucks, motorcycles, buses, boats, airplanes, helicopters, lawnmowers, recreational vehicles, construction equipment, electric cars, golf carts, trains, carts, etc., and embodiments of the present application are not particularly limited.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs.

The above embodiments are only examples of the present application, and are not intended to limit the present application, and any modifications, equivalent substitutions, improvements, etc. made on the basis of the present application should be included in the scope of the present application.

Claims

1. A display module, characterized in that it comprises: a display device and a phase compensation element, wherein a normal line of a light emitting plane of the display device and a normal line of a light emitting plane of the phase compensation element have a first angle greater than 0, a first coordinate axis of the light emitting plane of the display device and the first coordinate axis of the light emitting plane of the phase compensation element have a second angle greater than 0, and a second coordinate axis of the light emitting plane of the display device and the second coordinate axis of the light emitting plane of the phase compensation element have a third angle greater than 0,

The display device is used to emit a plurality of first light beams from a plurality of different angles;

The phase compensation element is used to compensate for the phase difference of each first light beam in the multiple first light beams.

2. The display module according to claim 1, characterized in that the display module further comprises an anti-reflection element, wherein the anti-reflection element is located between the display device and the phase compensation element.

The anti-reflection element is used to reduce the reflected light from the light emitting plane of the display device.

3 . The display module according to claim 2 , wherein the anti-reflection element is arranged on a surface of the phase compensation element.

4 . The display module according to claim 3 , wherein the anti-reflection element is arranged on a surface of a light emitting plane of the display device.

5. A display system, comprising: a light source and a display module as claimed in any one of claims 1 to 4,

The light source is used to generate incident light and emit the incident light toward the display module;

The display module generates a first image based on the incident light.

6. The display system according to claim 5, characterized in that the display system further comprises a microlens array and a first polarization element, wherein the microlens array is located between the light source and the first polarization element, and the first polarization element is located between the microlens array and the display module.

The microlens array is used to homogenize the incident light and emit a second light beam after homogenization to the first polarization element;

The first polarization element is used to convert the second light beam into a first polarized light and emit the first polarized light to the display module;

The display module generates the first image based on the first polarized light.

7. The display system according to claim 6, characterized in that the display system further comprises a collimating element, wherein the collimating element is located between the light source and the microlens array.

The collimating element is used to collimate the incident light and emit the collimated third light beam to the microlens array;

The microlens array is specifically used to homogenize the third light beam and generate the second light beam.

8. The display system according to claim 7, characterized in that the display system further comprises a projection module,

The display module is used to emit the first image light corresponding to the first image to the projection module;

The projection module is used to generate a second image according to the first image light.

9. The display system according to claim 8, characterized in that the display system further comprises a second polarization element, wherein the second polarization element is located between the display module and the projection module.

The second polarization element is used to convert the first image light into second polarized light, and emit the second polarized light to the projection module, wherein the polarization direction of the first polarized light is perpendicular to the polarization direction of the second polarized light;

The projection module is used to generate the second image according to the second polarized light.

10. The display system according to claim 9, characterized in that the display system further comprises a polarization beam splitter, wherein the polarization beam splitter is located between the first polarization element and the display module.

The polarization beam splitting element is used to reflect the first polarized light to the display device and transmit the second polarized light to the projection module.

11. A vehicle, characterized by comprising the display system and windshield according to any one of claims 5 to 10,

The projection module is used to emit second image light corresponding to the second image to the windshield;

The windshield is used to reflect the light from the second image to human eyes.

12. An in-vehicle system, comprising the display system according to any one of claims 5 to 10.